How do you install dampers in existing ductwork?


  1. Measure up the length of duct you want to cut out and mark it with a Sharpie.
  2. Take out this section of the duct.
  3. Cut out the section where you plan to install your air duct damper with your tin snips.
  4. Fix the section of duct you removed back in place.
  5. Pop your air damper in between these duct sections.

Where do you put a motorized damper?

Functions and importance of motorized fire damper

Overview: Motorized fire dampers are designed to be installed in HVAC ductwork at locations that are designated as fire barrier or fire & smoke barrier. It prevents the spread of fire or smoke inside residential, commercial and industrial buildings.

How do you install automatic dampers?

Quote from the video:
Quote from Youtube video: And now insert the damper into the opening. And once the damper is installed neatly into the opening the floor grille will go right over the damper.

Where are HVAC dampers located?

Typically in most homes, your HVAC dampers are located in the main supply trunks. The supply trunks are the parts of the ductwork that are blowing warm air or cold air depending on the season.

How much does it cost to add dampers to ductwork?

HVAC zone dampers cost $70 to $340 each, depending on the type, material, and quality. Dampers are plates, valves, or vents that open and close to direct the airflow in the ducts.

HVAC zone dampers installation cost.

Type Average cost
Rectangular dampers for large trunks $150 – $340

How much does it cost to install dampers in ductwork?

Expect to pay $350 on average to replace a motorized HVAC damper, with a typical range of $250 to $450. However, you could pay as little as $100 or as much as $600.

How are motorized dampers controlled?

Automatic Dampers are used to constantly regulate airflow and are operated by electric or pneumatic (Air Pressure) motors – each controlled by a thermostat or building automation system.

What does a motorized damper do?

Essentially, the damper regulates the flow of air inside the air handling equipment, influencing your overall health in the long term. A functioning motorized damper allows for temperature within a room to be controlled by you, regulating the flow of air in your home.

What is function of motorized damper in ducting?

A damper is a valve or plate that stops or regulates the flow of air inside a duct, chimney, VAV box, air handler, or other air-handling equipment. A damper may be used to cut off central air conditioning (heating or cooling) to an unused room, or to regulate it for room-by-room temperature and climate control.

Why is my room so hot compared to the rest of the house?

First, check for these common problems: Dirty air filter—A dirty filter restricts airflow, not letting your home get enough cool air. Closed vents—Closed vents in rooms can cause them to be hotter than other rooms. Open windows—Your conditioned air can flow out of open windows, leaving uneven temperatures in your home.

How do you increase airflow in ductwork?

Increasing airflow in ductwork can be done by cleaning the air filters and ductwork. By adding inline duct booster fans and/or air dampers significantly can improve airflow in weak areas.

How do you tell if a duct damper is open or closed?

The air control plate in a manual damper is turned by a lever on the outside of your duct. If the damper handle is in a horizontal position, the damper plate has been set to open. If the damper handle is set vertically, the damper is closed to block air flow.

Should AC damper be open or closed?

Never completely close or open a damper. You want to start by making slight adjustments in each room. If a room is too hot, you will want to crank open the damper just a bit to add more airflow to the room.

Is it OK to close HVAC dampers?

Is it Ok to Close HVAC Dampers? Yes! You can adjust your home’s temperature in various rooms by adjusting (opening/closing) your furnace’s dampers. A manual HVAC damper contains a door that can be manually opened or closed to adjust airflow in a particular zone, or room’s, ductwork.

Should damper be open or closed in summer?


Even if you have a chimney cap, it is a good idea to keep the damper closed in the summer. Chimney caps can become damaged creating a pathway for rainwater or pests to get into your chimney. Closing the damper will ensure that they can’t get into your home through the fireplace.

Can you leave damper open overnight?

Leave the damper open overnight. Yes, you will lose some heat up the flue, but you will save the occupants of the home from poisoning by colorless, odorless carbon monoxide. In the morning, stir the embers and check them for any hot spots.

What is the difference between a damper and a flue?

A damper is located in the flue of your chimney. The flue is where the smoke escapes when the fire is going. Dampers are placed inside of the flue to help control ventilation. Your damper should have a chain or handle that you can access in order to open and close it.

Is it OK to leave the flue open overnight?

The smoke from burning wood contains carbon monoxide, so in order to prevent this toxic byproduct from entering your home, it is important to leave the flue open overnight. This enables a draft to carry the compound out into the atmosphere, instead of sinking down the chimney and saturating the room.

How far should damper be open?

The damper should be kept open until all embers are finished burning to prevent smoke from escaping into the home. When the fireplace is not in use, the damper should always be closed. An open damper is like an open window, allowing large amounts of heat from the home to escape.

Should chimney flue be open or closed?

One of our off-season fireplace and chimney maintenance tips is to close your chimney damper when it is not in use. This can reduce your energy bills by preventing warm air from the outside from entering your home. If you have your damper open, it is like having a window open while your air conditioner is running.